WTJP21 RJTD 311800 WARNING 311800. WARNING VALID 011800. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 2410 SHANSHAN (2410) 998 HPA AT 33.1N 137.1E SEA SOUTH OF JAPAN MOVING EAST SLOWLY. POSITION GOOD. MAX WINDS 35 KNOTS. RADIUS OF OVER 30 KNOT WINDS 120 MILES EAST SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 010600UTC AT 33.8N 136.7E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1000 HPA, MAX WINDS 35 KNOTS. FORECAST POSITION FOR 011800UTC AT 35.4N 136.1E WITH 65 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1004 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=